<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>箭头函数</title>

</head>
<body>
<!--<script>-->
    <!--let show = ()=> 1;-->
    <!--console.log(show());-->
<!--</script>-->
<script>
    let show1=(a=12,b=5) => {
        console.log(a,b);
        return a+b;
    };
    show1();

</script>

</body>
</html>
